grep: reuse the first "util.binary()" result for efficiency Before this patch, to check whether the file in the specified revision is binary or not, "util.binary()" is invoked via internal function "binary()" of "hg grep" once per a line of "hg grep" output, even though binary-ness is not changed in the same file. This patch reuses the first "util.binary()" invocation result by annotating internal function "binary()" with "@util.cachefunc". Performance improvement measured by "hgperf grep -r 88d8e568add1 vfs mercurial/scmutil.py": before this patch: ! wall 0.024000 comb 0.015600 user 0.015600 sys 0.000000 (best of 118) after this patch: ! wall 0.023000 comb 0.015600 user 0.015600 sys 0.000000 (best of 123) Status of recent(88d8e568add1) "mercurial/scmutil.py": # of lines: 919 (may affect cost of search) # of bytes: 29633 (may affect cost of "util.binary()") # of matches: 22 (may affect frequency of "util.binary()")

util: add the code path to "cachefunc()" for the function taking no arguments Before this patch, "util.cachefunc()" caches the value returned by the specified function into dictionary "cache", even if the specified function takes no arguments. In such case, "cache" has at most one entry, and distinction between entries in "cache" is meaningless. This patch adds the code path to "cachefunc()" for the function taking no arguments for efficiency: to store only one cached value, using list "cache" is a little faster than using dictionary "cache".

help: add examples to incoming

revset: fix generatorset race condition If two things were iterating over a generatorset at the same time, they could miss out on the things the other was generating, resulting in incomplete results. This fixes it by making it possible for two things to iterate at once, by always checking the _genlist at the beginning of each iteration. I was only able to repro it with pending changes from my other commits, but they aren't ready yet. So I'm unable to add a test for now.

tests: don't hardcode path to bash interpreter Use the env binary to figure out the correct bash to use. Certain systems ships with an ancient version of bash, but the user might have installed a newer one that is earlier in $PATH. For example the current version of Mac OS X ships version 3.2.51 of bash, which does not understand new fancy builtins such as readarray. A user might install a newer version of bash, use that as their shell and add that path before bin.

contrib: don't hardcode path to bash interpreter Use the env binary to figure out the correct bash to use. Certain systems ships with an ancient version of bash, but the user might have installed a newer one that is earlier in $PATH. For example the current version of Mac OS X ships version 3.2.51 of bash, which does not understand new fancy builtins such as readarray. A user might install a newer version of bash, use that as their shell and add that path before bin.

contrib: explicitly enable perf extension for revset tests If a developer doesn't have the perf extension enabled the revset benchmarking will fail. This patch explicitly enables the perf extension when running the tests.